Controlled stable free radical emulsion polymerization processes
US6472486B2 · kind B2 · utility
13Cited by
30References
60Claims
0Family size
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Key dates
| Filing date | Jul 2, 1999 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jul 2, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/922
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Controlled stable free radical emulsion polymerization processes employ nitroxide control agents having an alpha carbon atom bearing a destabilizing substituent such as hydrogen. The emulsion polymerizations have living characteristics, including the re-initiation of polymer chains, and provide a high degree of control over molecular weight, particle size, polydispersity and polymer composition and architecture. The processes are useful for the preparation of polymer emulsions, including block copolymers, star and graft copolymers, telechelics and macromonomers from a wide range of monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.